Use Linux scripts to manage wireless networks

Article Title: Use Linux scripts to manage wireless networks. Linux is a technology channel of the IT lab in China. Includes desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories to set up a wireless Internet service provider (WISP) for your office or neighbors) there is no need for heavy labor or expensive investment. If you use some devices and Linux™You can use the powerful functions of shell scripts to simplify network management. This article provides some tips and scripts you need.

Creating a small wireless network with an existing wireless router is very simple. However, providing industry-standard wireless links to offices, apartments, or neighbors is another thing. After building a wireless network, you can run the wireless Internet service provider (WISP) service. To run WISP, you need to answer the following questions:

● What is the quality of the Internet connection provided?

● Which clients can directly connect to the network, and what are the quality of these connections?

● Is there enough bandwidth to meet the peak demand?

● Which clients have recently been connected to the network and their activity frequency?

● Which clients have reliable connections and which clients have unreliable connections?

● Does the client have many transmission errors and need to retry?

● Is there any version that can be upgraded for the installed software package?

● Will large files occupy a lot of space?

● How to simplify client management?

In this article, you will learn how to use Linux scripts to answer these questions. Before starting, you must set the server.

Wireless server hardware

I became a wireless Internet service provider because my neighbors do not have DSL or other Internet access services. Another WISP provides an (expensive) connection from a nearby mountain, so I decided to buy this service, share bandwidth with neighbors, and pay for it together. The wireless card at the access point generates a very weak signal. Therefore, in order to minimize the loss of the signal, I hope to make the antenna as short as possible. We also hope to build an outdoor antenna so that more neighbors can access this wireless link. These two devices allow me to set the server on an outdoor antenna (the reference link provides an image, also provides information about the products and packages discussed in this article ). This exemplary server is an existing wireless access point (WAP) which is installed in a waterproof Pelican box. It is not very reliable, so I often need to climb the roof to solve the problem. I need a ladder to help me climb down and upgrade the access point to a more reliable system. The next generation of hardware will:

● Very reliable.

● Supports 10 clients and provides some system management tools.

● Use a standard wireless network card.

● Supports power-on over Ethernet.

● It is Linux-friendly.

I purchased a very cheap system board (Soekris Engineering's net4521) that can fully meet these needs and use a Compact Flash Card without having to use a hard disk. This system board can be used in environments with great temperature changes without cooling fans.

The wireless card chip determines that the system board is Linux-friendly, and Intersil/Conexant Prism2/3 chip also provides good support for Linux.

Linux software

Pebble Linux is a release designed specifically for embedded wireless applications. The Pebble name is because it is very small and simple. This system contains some good features, such:

● Customized kernel for wireless use, so you do not need to re-compile the kernel.

● Size; the entire system is very small and can be placed in a small Compact Flash Card, so hard drive is no longer needed.

● The file system is loaded in read-only mode. Therefore, even if the power is down, the file system will not crash.

● Debian packages can be used because Debian Linux is released.

● Good support.

 

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